On Thu, 2003-08-21 at 06:24, Sri Sankaran wrote:
> I am a little confused over when an attribute value of ${whatever} is evaluated as
> an expression and when it is treated literally.
>
> In particular, I am noticing an inconsistency in the way an attribute value is being
> treated by <j:set> and <j:if>. It seems that <j:set>'s value attribute is treated
> literally; however, the <j:if>'s test attribute is evaluated as an expression.
>
> Consider the following property settings
> foo-bar.baz = bing
> foo_bar.baz = bing
> foo.bar.baz = bing
>
> Here are some usages:
> Example 1:
> <j:set var="fbb" value="${foo-bar.baz}"/>
> <echo message="fbb = ${fbb}"/>
> <j:if test="${foo-bar.baz == null}">
> <echo message="foo-bar.baz is null"/>
> </j:if>
>
> This outputs
> fbb is 0
0 is the result of the arithmethic expression (foo MINUS bar.baz).
One better should avoid "-" in property names.....
--
Martin Skopp
Riege Software International GmbH
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